74HC4538PW_技术文档

74HC4538

Dual retriggerable precision monostable multivibrator

Rev. 6 — 16 July 2021

Product data sheet

1. General description

The 74HC4538 is a dual retriggerable-resettable monostable multivibrator. Each multivibrator has

two trigger/retrigger inputs (nA and nB), a direct reset input (nCD), two complementary outputs (nQ

and nQ), and two pins (nREXT/CEXT and nCEXT) for connecting the external timing components

C_EXTand R_EXT. Typical pulse width variation over temperature range is ± 0.2 %. The device

may be triggered by either the positive or the negative edges of the input pulse. The duration

and accuracy of the output pulse are determined by the external timing components C_EXTand

R_EXT. The output pulse width (T_W) is equal to 0.7 × R_EXT× C_EXT. The linear design techniques

guarantee precise control of the output pulse width. A LOW level at nCD terminates the output

pulse immediately. Schmitt-trigger action in the trigger inputs makes the circuit highly tolerant to

slower rise and fall times. Inputs include clamp diodes. This enables the use of current limiting

resistors to interface inputs to voltages in excess of V_CC

.

2. Features and benefits

•

Wide supply voltage range from 2.0 to 6.0 V

•

CMOS low power dissipation

CMOS input levels

High noise immunity

Tolerant of slow trigger rise and fall times

Separate reset inputs

Triggering from falling or rising edge

Latch-up performance exceeds 100 mA per JESD 78 Class II Level B

Complies with JEDEC standards

•

JESD8C (2.7 V to 3.6 V)

JESD7A (2.0 V to 6.0 V)

•

ESD protection:

•

HBM JESD22-A114F exceeds 2000 V

MM JESD22-A115-A exceeds 200 V

Specified from -40 °C to +85 °C and from -40 °C to +125 °C

3. Ordering information

Table 1. Ordering information

Type number

Package

Temperature range Name

Description

Version

74HC4538D

-40 °C to +125 °C

SO16

plastic small outline package; 16 leads; body width 3.9 mm SOT109-1

74HC4538PW -40 °C to +125 °C

TSSOP16 plastic thin shrink small outline package; 16 leads;

body width 4.4 mm

SOT403-1

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74HC4538

Dual retriggerable precision monostable multivibrator

4. Functional diagram

2

1

1REXT/CEXT

1CEXT

1Q

6

7

5

4

1A

1B

3

1CD

2REXT/CEXT

2CEXT

14

15

2Q 10

11 2A

12 2B

2Q

9

13 2CD

001aae727

Fig. 1. Functional diagram

nB

nA

V

CC

nREXT/CEXT

nCEXT

enable

V

ref1

GND

nCD

power-on reset

V

ref2

enable

V

CC

nQ

mba338

GND

Fig. 2. Logic diagram (one multivibrator)

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Product data sheet

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74HC4538

Dual retriggerable precision monostable multivibrator

5. Pinning information

5.1. Pinning

74HC4538

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

1CEXT

V

CC

74HC4538

1REXT/CEXT

2CEXT

1CD

1B

2REXT/CEXT

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

1CEXT

V

CC

1REXT/CEXT

2CEXT

2CD

2B

1CD

1B

2REXT/CEXT

1A

2CD

2B

1A

1Q

2A

1Q

2A

1Q

2Q

1Q

2Q

GND

aaa-026540

aaa-026542

Fig. 3. Pin configuration SOT109-1 (SO16)

Fig. 4. Pin configuration SOT403-1 (TSSOP16)

5.2. Pin description

Table 2. Pin description

Symbol

Description

1CEXT, 2CEXT

1, 15

2, 14

3, 13

4, 12

5, 11

6, 10

7, 9

8

external capacitor connection (always connected to ground)

external capacitor/resistor connection

direct reset input (active LOW)

input (LOW to HIGH triggered)

input (HIGH to LOW triggered)

output

1REXT/CEXT, 2REXT/CEXT

1CD, 2CD

1B, 2B

1A, 2A

1Q, 2Q

GND

complementary output (active LOW)

ground (0 V)

V_CC

16

supply voltage

6. Functional description

Table 3. Function table

H = HIGH voltage level; L = LOW voltage level; X = don’t care;

↑ = positive-going transition; ↓ = negative-going transition;

= one HIGH level output pulse, with the pule width determined by C_EXTand R_EXT

;

= one LOW level output pulse, with the pulse width determined by C_EXTand R_EXT

.

Inputs

Outputs

nA

nB

nCD

nQ

↓

L

H

X

↑

H

L

X

L

H

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Product data sheet

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74HC4538

Dual retriggerable precision monostable multivibrator

(1)

(2)

(1)

nB input

(3)

nA input

(4)

nCD input

nREXT/CEXT input

V

ref2

V

ref1

nQ output

T

(5)

T

001aae737

(1) Positive edge triggering.

(2) Positive edge re-triggering (pulse lengthening).

(3) Negative edge triggering.

(4) Reset (pulse shortening).

(5) T_W= 0.7 x R_EXTx C_EXT(see also Fig. 6).

Fig. 5. Timing diagram

C

EXT

R

EXT

V

GND

CC

nCEXT

nREXT/CEXT

nQ

T

T = 0.7 × R

nA

nB

nQ

× C

EXT

nCD

001aak192

Fig. 6. Connection of the external timing components R_EXTand C_EXT

7. Limiting values

Table 4. Limiting values

In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).

Symbol Parameter

Conditions

Min

Max

+7.0

±20

±25

+50

-

Unit

V

V_CC

I_IK

supply voltage

-0.5

input clamping current

output clamping current

output current

V_I< -0.5 V or V_I> V_CC+ 0.5 V

V_O< -0.5 V or V_O> V_CC+ 0.5 V

V_O= -0.5 V to V_CC+ 0.5 V

[1]

-

mA

°C

I_OK

I_O

-

I_CC

I_GND

T_stg

P_tot

supply current

-

ground current

-50

-65

-

storage temperature

total power dissipation

+150

500

T_amb= -40 °C to +125 °C

[2]

mW

[1] The input and output voltage ratings may be exceeded if the input and output current ratings are observed.

[2] For SOT109-1 (SO16) package: P_totderates linearly with 12.4 mW/K above 110 °C.

For SOT403-1 (TSSOP16) package: P_totderates linearly with 8.5 mW/K above 91 °C.

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74HC4538

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Product data sheet

Rev. 6 — 16 July 2021

4 / 17

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74HC4538

Dual retriggerable precision monostable multivibrator

8. Recommended operating conditions

Table 5. Recommended operating conditions

Voltages are referenced to GND (ground = 0 V)

Symbol Parameter

Conditions

Min

Typ

Max

6.0

Unit

V

V_CC

V_I

supply voltage

2.0

5.0

input voltage

0

-

V_CC

+125

625

139

83

V

V_O

output voltage

-

V

T_amb

Δt/ΔV

ambient temperature

input transition rise and fall rate

-40

-

°C

V_CC= 2.0 V

V_CC= 4.5 V

V_CC= 6.0 V

-

1.67

-

ns/V

-

9. Static characteristics

Table 6. Static characteristics

At recommended operating conditions; voltages are referenced to GND (ground = 0 V).

Symbol Parameter

Conditions

25 °C

-40 °C to +85 °C

-40 °C to +125 °C Unit

Min Typ Max

Min

1.5

3.15

4.2

-

Max

-

Min

1.5

3.15

4.2

-

Max

-

V_IH

HIGH-level

input voltage

V_CC= 2.0 V

V_CC= 4.5 V

V_CC= 6.0 V

V_CC= 2.0 V

V_CC= 4.5 V

V_CC= 6.0 V

V_I= V_IHor V_IL

1.5

1.2

-

V

3.15 2.4

-

4.2

3.2

0.8

-

V_IL

LOW-level

input voltage

-

0.5

1.35

1.8

0.5

1.35

1.8

2.1 1.35

-

2.8

1.8

-

V_OH

HIGH-level

output voltage

I_O= -20 μA; V_CC= 2.0 V

1.9

4.4

5.9

2.0

4.5

6.0

-

1.9

4.4

-

1.9

4.4

5.9

3.7

5.2

-

V

I_O= -20 μA; V_CC= 4.5 V

I_O= -20 μA; V_CC= 6.0 V

5.9

I_O= -4.0 mA; V_CC= 4.5 V 3.98 4.32

I_O= -5.2 mA; V_CC= 6.0 V 5.48 5.81

3.84

5.34

V_OL

LOW-level

V_I= V_IHor V_IL

output voltage

I_O= 20 μA; V_CC= 2.0 V

-

0

0.1

-

0.1

-

0.1

0.4

±1

V

I_O= 20 μA; V_CC= 4.5 V

I_O= 20 μA; V_CC= 6.0 V

I_O= 4.0 mA; V_CC= 4.5 V

I_O= 5.2 mA; V_CC= 6.0 V

V

0.1

V

0.15 0.26

0.16 0.26

0.33

±1

V

I_I

input leakage V_I= V_CCor GND;

-

±0.1

μA

current

V_CC= 6.0 V

pin nREXT/CEXT;

V_I= 2.0 V or GND;

other inputs at V_CCor GND;

V_CC= 6.0 V [1]

-

±50

-

±500

-

±500

nA

μA

I_CC

supply current V_I= V_CCor GND; I_O= 0 A;

V_CC= 6.0 V

-

8.0

-

80

-

160

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Product data sheet

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74HC4538

Dual retriggerable precision monostable multivibrator

Symbol Parameter

Conditions

25 °C

-40 °C to +85 °C

-40 °C to +125 °C Unit

Min Typ Max

Min

Max

Min

Max

C_I

input

-

3.5

-

pF

capacitance

[1] This measurement can only be carried out after a trigger pulse is applied.

10. Dynamic characteristics

Table 7. Dynamic characteristics

Voltages are referenced to GND (ground = 0 V); for test circuit see Fig. 9.

Symbol Parameter

Conditions

25 °C

-40 °C to +85 °C -40 °C to +125 °C Unit

Min Typ[1] Max

Min

Max

Min

Max

t_PLH

t_PHL

t_t

LOW to HIGH nA, nB to nQ; see Fig. 7

propagation

delay

V_CC= 2.0 V

-

85

31

27

25

265

53

-

330

66

-

400

80

-

ns

V_CC= 4.5 V

V_CC= 5.0 V; C_L= 15 pF

V_CC= 6.0 V

45

56

68

nCD to nQ; see Fig. 7

V_CC= 2.0 V

-

83

30

24

265

53

-

340

68

-

400

80

ns

V_CC= 4.5 V

V_CC= 6.0 V

45

58

68

HIGH to LOW nA, nB to nQ; see Fig. 7

propagation

delay

V_CC= 2.0 V

-

83

30

27

24

265

53

-

330

66

-

400

80

-

ns

V_CC= 4.5 V

V_CC= 5.0 V; C_L= 15 pF

V_CC= 6.0 V

45

56

68

nCD to nQ; see Fig. 7

V_CC= 2.0 V

-

80

29

23

265

53

-

330

66

-

400

80

ns

V_CC= 4.5 V

V_CC= 6.0 V

45

56

68

transition time nQ and nQ; see Fig. 7

V_CC= 2.0 V

[2]

-

19

7

75

15

13

-

95

19

16

-

119

22

ns

V_CC= 4.5 V

V_CC= 6.0 V

6

19

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Product data sheet

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74HC4538

Dual retriggerable precision monostable multivibrator

Symbol Parameter

Conditions

25 °C

-40 °C to +85 °C -40 °C to +125 °C Unit

Min Typ[1] Max

Min

Max

Min

Max

t_W

pulse width

nA LOW; see Fig. 8

V_CC= 2.0 V

80

16

14

17

6

-

100

20

-

120

24

-

ns

V_CC= 4.5 V

V_CC= 6.0 V

5

17

20

nB HIGH; see Fig. 8

V_CC= 2.0 V

80

16

14

17

6

-

100

20

-

120

24

-

ns

V_CC= 4.5 V

V_CC= 6.0 V

5

17

20

nCD LOW; see Fig. 8

V_CC= 2.0 V

80

16

14

19

7

-

100

20

-

120

24

-

ns

V_CC= 4.5 V

V_CC= 6.0 V

6

17

20

nQ and nQ HIGH or LOW;

see Fig. 8

V_CC= 5.0 V;

C_EXT= 0.1 μF;

R_EXT= 10 kΩ

630

700

770

602

798

595

805

μs

t_rec

recovery time nCD to nA, nB;

see Fig. 8

V_CC= 2.0 V

V_CC= 4.5 V

V_CC= 6.0 V

35

7

6

2

-

45

9

-

55

11

9

-

ns

6

8

t_rtrig

retrigger time nA, nB; see Fig. 8;

X = C_EXT/ (4.5 × V_CC

)

V_CC= 2.0 V

V_CC= 4.5 V

V_CC= 6.0 V

-

455+X

-

ns

kΩ

80+X

-

55+X

-

R_EXT

C_EXT

C_PD

external

timing

resistor

V_CC= 2.0 V

V_CC= 5.0 V

10

2

-

1000

external

timing

capacitor

no limits

power

dissipation

capacitance

per multivibrator;

V_I= GND to V_CC

[3]

-

136

-

pF

[1] Typical values are measured at nominal supply voltage (V_CC= 3.3 V and V_CC= 5.0 V).

[2] t_tis the same as t_THLand t_TLH

.

[3] C_PDis used to determine the dynamic power dissipation (P_Din μW).

P_D= C_PD× V_CC²× f_i+ Σ(C_L× V_CC²× f_o) + 0.48 × C_EXT× V_CC²× f_o+ D × 0.8 × V_CCwhere:

f_i= input frequency in MHz;

f_o= output frequency in MHz;

Σ(C_L× V_CC²× f_o) = sum of the outputs;

C_L= output load capacitance in pF;

V_CC= supply voltage in V;

D = duty cycle factor in %;

C_EXT= external timing capacitance in pF.

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Product data sheet

Rev. 6 — 16 July 2021

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74HC4538

Dual retriggerable precision monostable multivibrator

10.1. Waveforms and test circuit

V

I

nB input

GND

V

M

t

W

V

I

nA input

GND

V

M

t

W

V

I

nCD input

GND

V

M

t

PHL

PLH

PHL

V

OH

V

Y

nQ output

V

M

V

X

V

OL

t

PLH

PHL

THL

TLH

V

OH

V

Y

nQ output

V

M

V

X

V

OL

001aak194

Measurement points are given in Table 8.

Logic levels: V_OLand V_OHare typical output levels that occur with the output load.

Fig. 7. Waveforms showing propagation delays and transition times

V

I

nCD input

GND

V

M

t

W

rec

V

I

nA input

GND

V

M

t

W

V

I

nB input

GND

V

M

t

rtrig

V

OH

nQ, nQ output

V

M

V

OL

t

W

001aak195

Measurement points are given in Table 8.

Logic levels: V_OLand V_OHare typical output levels that occur with the output load.

Fig. 8. Waveforms showing nA, nB, nQ, nQ pulse widths, recovery and retrigger times

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Product data sheet

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74HC4538

Dual retriggerable precision monostable multivibrator

Table 8. Measurement points

Input

Output

V_M

V_X

V_Y

0.5V_CC

0.1V_CC

0.9V_CC

t

W

V

I

90 %

negative

pulse

V

M

10 %

0 V

t

r

f

t

f

r

V

I

90 %

positive

pulse

V

M

10 %

0 V

t

W

V

CC

V

I

V

O

R

L

S1

G

open

DUT

R

T

C

L

001aad983

Test data is given in Table 9 .

Definitions test circuit:

R_T= Termination resistance should be equal to output impedance Z_oof the pulse generator.

C_L= Load capacitance including jig and probe capacitance.

R_L= Load resistance.

S1 = Test selection switch

Fig. 9. Test circuit for measuring switching times

Table 9. Test data

Input

V_I

Load

S1 position

t_PHL, t_PLH

open

t_r, t_f

C_L

R_L

V_CC

6 ns

15 pF, 50 pF

1 kΩ

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Product data sheet

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74HC4538

Dual retriggerable precision monostable multivibrator

11. Application information

11.1. Power-down considerations

A large capacitor (C_EXT) may cause problems when powering-down the monostable due to energy

stored in this capacitor. When a system containing this device is powered-down or rapid decrease

of V_CCto zero occurs, the monostable may sustain damage, due to the capacitor discharging

through the input protection diodes. To avoid this possibility, use a damping diode (D_EXT) preferably

a germanium or Schottky type diode able to withstand large current surges and connect as shown

in Fig. 10

D

R

EXT

C

EXT

V

GND

CC

nCEXT

nREXT/CEXT

001aak193

Fig. 10. Power-down protection circuit

11.2. Graphs

001aak196

1.6

1.12

1 kΩ

2 kΩ

normalized

K factor

(K)

R

C

(t

×

EXT

5.6 kΩ

51 kΩ

1 MΩ

EXT

)

W

1.2

1.0

0.8

0.6

0.84

0.70

0.56

0.42

- 10

- 9

- 8

- 7

- 6

- 5

- 4

10

C

EXT

(F)

V_CC= 4.5 V; T_amb= 25 °C.

Fig. 11. Typical pulse width accuracy versus external capacitance

001aak197

1.6

1.12

normalized

K factor

(K)

R

C

EXT

(t

×

EXT

)

W

1.2

1.0

0.8

0.6

0.84

0.70

0.56

0.42

1 nF

> 100 nF

3

4

5

6

10

R

EXT

(Ω)

V_CC= 4.5 V; T_amb= 25 °C.

Fig. 12. Typical pulse width accuracy versus external resistance

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Product data sheet

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74HC4538

Dual retriggerable precision monostable multivibrator

001aak198

1.6

1.12

normalized

K factor

(K)

R

C

(t

×

EXT

)

W

1.2

1.0

0.8

0.6

0.84

0.70

0.56

0.42

+10 %

R

EXT

- 10 %

- 10

- 9

- 8

- 7

- 6

- 5

- 4

10

C

EXT

(F)

V_CC= 4.5 V; R_EXT= 10 kΩ; T_amb= 25 °C.

Fig. 13. Typical pulse width accuracy versus external capacitance

001aak199

1.7

1.19

2 kΩ

1 kΩ

normalized

K factor

(K)

R

C

(t

×

EXT

)

W

5.6 kΩ

1.3

1.1

0.9

0.7

0.91

0.77

0.63

0.49

10 kΩ

1 MΩ

1

2

3

4

5

6

V

(V)

CC

C_EXT= 1 nF; T_amb= 25 °C.

Fig. 14. Typical pulse width accuracy versus power supply

001aak200

1.7

1.19

normalized

K factor

(K)

R

C

(t

×

EXT

)

W

1 kΩ

1.3

0.91

0.77

0.63

0.49

2 kΩ

1.1

5.6 kΩ

1 MΩ

0.9

0.7

1

2

3

4

5

6

V

(V)

CC

C_EXT= 100 nF; T_amb= 25 °C.

Fig. 15. Typical pulse width accuracy versus power supply

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Product data sheet

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74HC4538

Dual retriggerable precision monostable multivibrator

001aak201

1.7

1.19

1 kΩ

normalized

K factor

(K)

R

C

(t

×

EXT

)

W

2 kΩ

1.3

1.1

0.9

0.7

0.91

5.6 kΩ

1 MΩ 0.77

0.63

0.49

150

- 50

0

50

100

T

(°C)

amb

V_CC= 4.5 V; C_EXT= 1 nF; T_amb= 25 °C.

Fig. 16. Typical pulse width accuracy versus temperature

001aak202

1.7

1.19

normalized

K factor

(K)

R

C

(t

×

EXT

)

W

1.3

1.1

0.9

0.7

0.91

0.77

0.63

0.49

1 kΩ

2 kΩ

5.6 kΩ

1 MΩ

- 50

0

50

100

150

T

(°C)

amb

V_CC= 4.5 V; C_EXT= 1 μF; T_amb= 25 °C.

Fig. 17. Typical pulse width accuracy versus temperature

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Product data sheet

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74HC4538

Dual retriggerable precision monostable multivibrator

12. Package outline

SO16: plastic small outline package; 16 leads; body width 3.9 mm

SOT109-1

D

E

A

X

v

c

y

H

M

A

E

Z

16

9

Q

A

2

A

(A )

3

A

1

pin 1 index

θ

L

p

L

1

8

e

w

M

detail X

b

p

0

2.5

scale

5 mm

DIMENSIONS (inch dimensions are derived from the original mm dimensions)

A

(1)

UNIT

A

b

c

D

E

e

H

E

L

p

Q

v

w

y

Z

θ

1

2

3

p

max.

0.25

0.10

1.45

1.25

0.49

0.36

0.25

0.19

10.0

9.8

4.0

3.8

6.2

5.8

1.0

0.4

0.7

0.6

0.7

0.3

mm

1.27

0.05

1.05

0.041

1.75

0.25

0.01

0.25

0.1

0.25

0.01

8^o

0^o

0.0100

0.0075

0.010 0.057

0.004 0.049

0.019

0.014

0.39

0.38

0.16

0.15

0.244

0.228

0.039 0.028

0.016 0.020

0.028

0.012

inches

0.069

0.01 0.004

Note

1. Plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included.

REFERENCES

OUTLINE

EUROPEAN

PROJECTION

ISSUE DATE

VERSION

IEC

JEDEC

JEITA

99-12-27

03-02-19

SOT109-1

076E07

MS-012

Fig. 18. Package outline SOT109-1 (SO16)

©

74HC4538

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 6 — 16 July 2021

13 / 17

Nexperia

74HC4538

Dual retriggerable precision monostable multivibrator

TSSOP16: plastic thin shrink small outline package; 16 leads; body width 4.4 mm

SOT403-1

D

E

A

X

c

y

H

v

M

A

E

Z

9

16

Q

(A )

3

A

2

A

1

pin 1 index

θ

L

p

L

1

8

detail X

w

M

b

p

e

0

2.5

5 mm

scale

DIMENSIONS (mm are the original dimensions)

A

(1)

(2)

(1)

UNIT

A

b

c

D

E

e

H

L

Q

v

w

y

Z

θ

1

2

3

p

E

p

max.

8^o

0^o

0.15

0.05

0.95

0.80

0.30

0.19

0.2

0.1

5.1

4.9

4.5

4.3

6.6

6.2

0.75

0.50

0.4

0.3

0.40

0.06

mm

1.1

0.65

1

0.2

0.13

0.1

0.25

Notes

1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.

2. Plastic interlead protrusions of 0.25 mm maximum per side are not included.

REFERENCES

OUTLINE

EUROPEAN

PROJECTION

ISSUE DATE

VERSION

IEC

JEDEC

JEITA

99-12-27

03-02-18

SOT403-1

MO-153

Fig. 19. Package outline SOT403-1 (TSSOP16)

©

74HC4538

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 6 — 16 July 2021

14 / 17

Nexperia

74HC4538

Dual retriggerable precision monostable multivibrator

13. Abbreviations

Table 10. Abbreviations

Acronym

CMOS

DUT

Description

Complementary Metal-Oxide Semiconductor

Device Under Test

ElectroStatic Discharge

Human Body Model

Machine Model

ESD

HBM

MM

14. Revision history

Table 11. Revision history

Document ID

Release date Data sheet status

20210716 Product data sheet

Change notice Supersedes

- 74HC4538 v.5

74HC4538 v.6

Modifications:

•

Type number 74HC4538DB (SOT338-1/SSOP16) removed.

Section 2 updated.

Section 7: Derating values for P_tottotal power dissipation updated.

74HC4538 v.5

Modifications:

20170317

Product data sheet

-

74HC_HCT4538 v.4

•

Type numbers 74HCT4538D, 74HCT4538DB, 74HCT4538PW removed.

Table 6: Maximum input leakage current for pins 1REXT/CEXT and 2REXT/CEXT

changed.

74HC_HCT4538 v.4

Modifications:

20160224

Type numbers 74HC4538N and 74HCT4538N (SOT38-4) removed.

20090608 Product data sheet 74HC_HCT4538_CNV v.2

Product data sheet

-

74HC_HCT4538 v.3

•

74HC_HCT4538 v.3

Modifications:

-

•

The format of this data sheet has been redesigned to comply with the new identity

guidelines of NXP Semiconductors.

•

Legal texts have been adapted to the new company name where appropriate.

Pin names changed throughout.

Section Section 7, Section 8 and Section 9 added, taken from the 74HC/T HCMOS

Family characteristics/specification (March 1988).

•

Test circuit added: Fig. 9.

Quick reference data incorporated in to Section 9 and Section 10.

Package information added for DIP16, SO16, SSOP16 and TSSOP16 packages.

74HC_HCT4538_CNV v.2

19970902

Product specification

-

©

74HC4538

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 6 — 16 July 2021

15 / 17

Nexperia

74HC4538

Dual retriggerable precision monostable multivibrator

injury, death or severe property or environmental damage. Nexperia and its

suppliers accept no liability for inclusion and/or use of Nexperia products in

such equipment or applications and therefore such inclusion and/or use is at

the customer’s own risk.

15. Legal information

Quick reference data — The Quick reference data is an extract of the

product data given in the Limiting values and Characteristics sections of this

document, and as such is not complete, exhaustive or legally binding.

Data sheet status

Document status Product

Definition

Applications — Applications that are described herein for any of these

products are for illustrative purposes only. Nexperia makes no representation

or warranty that such applications will be suitable for the specified use

without further testing or modification.

[1][2]

status [3]

Objective [short]

data sheet

Development

This document contains data from

the objective specification for

product development.

Customers are responsible for the design and operation of their applications

and products using Nexperia products, and Nexperia accepts no liability for

any assistance with applications or customer product design. It is customer’s

sole responsibility to determine whether the Nexperia product is suitable

and fit for the customer’s applications and products planned, as well as

for the planned application and use of customer’s third party customer(s).

Customers should provide appropriate design and operating safeguards to

minimize the risks associated with their applications and products.

Preliminary [short]

data sheet

Qualification

Production

This document contains data from

the preliminary specification.

Product [short]

data sheet

This document contains the product

specification.

[1] Please consult the most recently issued document before initiating or

completing a design.

Nexperia does not accept any liability related to any default, damage, costs

or problem which is based on any weakness or default in the customer’s

applications or products, or the application or use by customer’s third party

customer(s). Customer is responsible for doing all necessary testing for the

customer’s applications and products using Nexperia products in order to

avoid a default of the applications and the products or of the application or

use by customer’s third party customer(s). Nexperia does not accept any

liability in this respect.

[2] The term 'short data sheet' is explained in section "Definitions".

[3] The product status of device(s) described in this document may have

changed since this document was published and may differ in case of

multiple devices. The latest product status information is available on

the internet at https://www.nexperia.com.

Definitions

Limiting values — Stress above one or more limiting values (as defined in

the Absolute Maximum Ratings System of IEC 60134) will cause permanent

damage to the device. Limiting values are stress ratings only and (proper)

operation of the device at these or any other conditions above those

given in the Recommended operating conditions section (if present) or the

Characteristics sections of this document is not warranted. Constant or

repeated exposure to limiting values will permanently and irreversibly affect

the quality and reliability of the device.

Draft — The document is a draft version only. The content is still under

internal review and subject to formal approval, which may result in

modifications or additions. Nexperia does not give any representations or

warranties as to the accuracy or completeness of information included herein

and shall have no liability for the consequences of use of such information.

Short data sheet — A short data sheet is an extract from a full data sheet

with the same product type number(s) and title. A short data sheet is

intended for quick reference only and should not be relied upon to contain

detailed and full information. For detailed and full information see the relevant

full data sheet, which is available on request via the local Nexperia sales

office. In case of any inconsistency or conflict with the short data sheet, the

full data sheet shall prevail.

Terms and conditions of commercial sale — Nexperia products are

sold subject to the general terms and conditions of commercial sale, as

published at http://www.nexperia.com/profile/terms, unless otherwise agreed

in a valid written individual agreement. In case an individual agreement is

concluded only the terms and conditions of the respective agreement shall

apply. Nexperia hereby expressly objects to applying the customer’s general

terms and conditions with regard to the purchase of Nexperia products by

customer.

Product specification — The information and data provided in a Product

data sheet shall define the specification of the product as agreed between

Nexperia and its customer, unless Nexperia and customer have explicitly

agreed otherwise in writing. In no event however, shall an agreement be

valid in which the Nexperia product is deemed to offer functions and qualities

beyond those described in the Product data sheet.

No offer to sell or license — Nothing in this document may be interpreted

or construed as an offer to sell products that is open for acceptance or the

grant, conveyance or implication of any license under any copyrights, patents

or other industrial or intellectual property rights.

Export control — This document as well as the item(s) described herein

may be subject to export control regulations. Export might require a prior

authorization from competent authorities.

Disclaimers

Limited warranty and liability — Information in this document is believed

to be accurate and reliable. However, Nexperia does not give any

representations or warranties, expressed or implied, as to the accuracy

or completeness of such information and shall have no liability for the

consequences of use of such information. Nexperia takes no responsibility

for the content in this document if provided by an information source outside

of Nexperia.

Non-automotive qualified products — Unless this data sheet expressly

states that this specific Nexperia product is automotive qualified, the

product is not suitable for automotive use. It is neither qualified nor tested in

accordance with automotive testing or application requirements. Nexperia

accepts no liability for inclusion and/or use of non-automotive qualified

products in automotive equipment or applications.

In no event shall Nexperia be liable for any indirect, incidental, punitive,

special or consequential damages (including - without limitation - lost

profits, lost savings, business interruption, costs related to the removal

or replacement of any products or rework charges) whether or not such

damages are based on tort (including negligence), warranty, breach of

contract or any other legal theory.

In the event that customer uses the product for design-in and use in

automotive applications to automotive specifications and standards,

customer (a) shall use the product without Nexperia’s warranty of the

product for such automotive applications, use and specifications, and (b)

whenever customer uses the product for automotive applications beyond

Nexperia’s specifications such use shall be solely at customer’s own risk,

and (c) customer fully indemnifies Nexperia for any liability, damages or failed

product claims resulting from customer design and use of the product for

automotive applications beyond Nexperia’s standard warranty and Nexperia’s

product specifications.

Notwithstanding any damages that customer might incur for any reason

whatsoever, Nexperia’s aggregate and cumulative liability towards customer

for the products described herein shall be limited in accordance with the

Terms and conditions of commercial sale of Nexperia.

Translations — A non-English (translated) version of a document is for

reference only. The English version shall prevail in case of any discrepancy

between the translated and English versions.

Right to make changes — Nexperia reserves the right to make changes

to information published in this document, including without limitation

specifications and product descriptions, at any time and without notice. This

document supersedes and replaces all information supplied prior to the

publication hereof.

Trademarks

Suitability for use — Nexperia products are not designed, authorized or

warranted to be suitable for use in life support, life-critical or safety-critical

systems or equipment, nor in applications where failure or malfunction

of an Nexperia product can reasonably be expected to result in personal

Notice: All referenced brands, product names, service names and

trademarks are the property of their respective owners.

©

74HC4538

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 6 — 16 July 2021

16 / 17

Nexperia

74HC4538

Dual retriggerable precision monostable multivibrator

Contents

1. General description......................................................1

2. Features and benefits.................................................. 1

3. Ordering information....................................................1

4. Functional diagram.......................................................2

5. Pinning information......................................................3

5.1. Pinning.........................................................................3

5.2. Pin description.............................................................3

6. Functional description................................................. 3

7. Limiting values............................................................. 4

8. Recommended operating conditions..........................5

9. Static characteristics....................................................5

10. Dynamic characteristics............................................ 6

10.1. Waveforms and test circuit........................................ 8

11. Application information............................................10

11.1. Power-down considerations.....................................10

11.2. Graphs..................................................................... 10

12. Package outline........................................................ 13

13. Abbreviations............................................................15

14. Revision history........................................................15

15. Legal information......................................................16

For more information, please visit: http://www.nexperia.com

For sales office addresses, please send an email to: salesaddresses@nexperia.com

Date of release: 16 July 2021

©

74HC4538

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 6 — 16 July 2021

17 / 17


型号：	74HC4538PW
厂家：	Nexperia
描述：	Dual retriggerable precision monostable multivibratorProduction 时钟光电二极管逻辑集成电路
文件：	总17页 (文件大小：289K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

74HC4538PW [NEXPERIA]

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